using pointer in function c code example

Example 1: pass the pointer in C

// passing a pointer to function in C
// It increaments the salary of an employee


#include <stdio.h>
void salaryhike(int  *var, int b)
{
    *var = *var+b;
}
int main()
{
    int salary=0, bonus=0;
    printf("Enter the employee current salary:"); 
    scanf("%d", &salary);
    printf("Enter bonus:");
    scanf("%d", &bonus);
    salaryhike(&salary, bonus);
    printf("Final salary: %d", salary);
    return 0;
}

Example 2: how to use a pointer as a parameter in c

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
void add(int* a, int* b, int* c)
{
    *c = *a + *b;
}
int main()
{
	int a, b, c;
	a = 3;
	b = 5;
	add(&a, &b, &c);
	printf("%d", c);
}

Example 3: pointer inside structure in c

#include<stdio.h>

struct Student
{
   int  *ptr;  //Stores address of integer Variable 
   char *name; //Stores address of Character String
}s1;

int main() 
{

int roll = 20;
s1.ptr   = &roll;
s1.name  = "Pritesh";

printf("\nRoll Number of Student : %d",*s1.ptr);
printf("\nName of Student        : %s",s1.name);

return(0);
}